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以煤沥青甲苯可溶组分、聚碳硅烷、吡啶硼烷和ZrB_2有机前驱体为原料,通过低温裂解制备掺杂沥青,经过不同温度热处理得到B–Si–Zr掺杂炭材料,考察了掺杂炭材料抗氧化性能。用X射线衍射仪、扫描电子显微镜等对B–Si–Zr掺杂炭材料氧化前后的物相组成和微观结构进行表征。结果表明:1600℃热处理得到的B–Si–Zr掺杂炭材料中,ZrB_2陶瓷颗粒逐渐形成,在氧化过程中,SiC和ZrB_2等陶瓷与氧气反应生成SiO_2、B_2O_3和ZO_2,氧化物在炭材料表面形成保护膜,该热处理温度得到的掺杂炭材料抗氧化性较强。
The bitumen-soluble components of toluene, polycarbosilane, pyridine borane and ZrB 2 organic precursors were used as raw materials to prepare doped bitumen by low temperature pyrolysis. The B-Si-Zr doped carbon materials were obtained by heat treatment at different temperatures. Anti-oxidation of carbon materials. The phase composition and microstructure of B-Si-Zr doped carbon before and after oxidation were characterized by X-ray diffraction and scanning electron microscopy. The results show that ZrB_2 ceramic particles gradually form in the B-Si-Zr doped carbon material obtained by heat treatment at 1600 ℃. During the oxidation process, SiC and ZrB_2 react with oxygen to form SiO_2, B_2O_3 and ZO_2, A protective film is formed on the surface, and the doping carbon material obtained by the heat treatment temperature has strong oxidation resistance.